Malicious PDF — malware analysis report

Static analysis result for SHA-256 24e0a0d9afb1dfe9…

MALICIOUS

PDF

66.6 KB Created: 2020-11-11 00:46:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 05c1026220dd6e9431ca54fec5a041c6 SHA-1: 9a0e5354b367bbab3500a5c2900d06ec390577d7 SHA-256: 24e0a0d9afb1dfe9488b57e5d42f6fb8b3d9873bd3bed81a940d1abd0a57c8df
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with a critical heuristic firing indicating it's a link farm pointing to malicious redirector infrastructure. The primary malicious URL identified is ggtraff.ru, which is used in conjunction with SEO-related keywords. While no scripts were extracted, the structure and heuristics strongly suggest a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ggtraff.ru/aws?keyword=royal+doulton+toby+mugs+price+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366632/normal_5f87ec6d91342.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406473/normal_5fa0eb3822b16.pdfIn PDF document text
    • https://ridolagu.weebly.com/uploads/1/3/0/7/130775195/gipijepaborakon.pdfIn PDF document text
    • https://zuzilenew.weebly.com/uploads/1/3/4/5/134527977/befemamowonel-sofala-vumox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380209/normal_5f914ff4ac3e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f87184000417.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422893/normal_5f9d48d138c6b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2597ba26-d6b5-426b-ba19-27ce7dad51fa/3994422602.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a530717b-3f67-4d53-916a-80ab942fb95e/besame_mucho_sheet_music.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC460 5640 bytes
SHA-256: a0bdb9654d9cd7a13fd066815abf6bf42518db1b272f0f0e2ce90be19c636863
font_01_sfnt_off0000d784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD784 10812 bytes
SHA-256: e45fbf3fed8ebfb38f04a15aa6e289377436de816007df9d617744399887328d

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